EP3410978A1 - Chambre à poudre, fermeture pour une chambre à poudre et appareil de projection de poudre - Google Patents

Chambre à poudre, fermeture pour une chambre à poudre et appareil de projection de poudre

Info

Publication number
EP3410978A1
EP3410978A1 EP17705810.4A EP17705810A EP3410978A1 EP 3410978 A1 EP3410978 A1 EP 3410978A1 EP 17705810 A EP17705810 A EP 17705810A EP 3410978 A1 EP3410978 A1 EP 3410978A1
Authority
EP
European Patent Office
Prior art keywords
powder
powder chamber
chamber
closure
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17705810.4A
Other languages
German (de)
English (en)
Other versions
EP3410978B1 (fr
Inventor
Marcel Donnet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferton Holding SA
Original Assignee
Ferton Holding SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferton Holding SA filed Critical Ferton Holding SA
Publication of EP3410978A1 publication Critical patent/EP3410978A1/fr
Application granted granted Critical
Publication of EP3410978B1 publication Critical patent/EP3410978B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0069—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with means for preventing clogging of the equipment or for preventing abrasive entering the airway
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass

Definitions

  • the present invention relates to a powder can, in particular for or from a dental powder blasting apparatus, a closure for a powder chamber and a powder blasting machine.
  • a dental powder stored in a container or a powder chamber is delivered together with a gaseous carrier medium (for example air) to a nozzle arrangement of a handpiece connected via a discharge, generally with the addition of pressurized water.
  • a gaseous carrier medium for example air
  • air is passed from above into the powder chamber
  • the second type which is described in detail for example in EP 2,193,758 B1 is characterized by a very uniform powder / air mixture stream.
  • DE 1 773 414 also deals with the problem and proposes a vacuum dosing and mixing device for finely powdered, electrostatically charging, materials, preferably dental materials, before, consisting of reservoirs for the material to be dosed, at the bottom, preferably with respect to the Receptacle cross-section tapered, outflow openings, metering chambers are arranged, which are formed as recesses of a metering roller, wherein the bottom of the metering chambers for the electrostatically charging powder is designed to be permeable to air.
  • metering chambers are arranged, which are formed as recesses of a metering roller, wherein the bottom of the metering chambers for the electrostatically charging powder is designed to be permeable to air.
  • This object is achieved by a powder container according to claim 1, by a closure according to claim 12 and by a powder blasting apparatus according to claim 14. Further advantages and features will become apparent from the dependent claims and the description and the accompanying figures.
  • a powder chamber in particular for or from a dental powder blasting device, has at least one guide region which is designed to be electrically conductive, wherein the at least one guide region has a contact surface which is formed or arranged within the powder chamber.
  • the powder chamber is designed to receive or store within it a powder, as used for dental powder jet cleaning.
  • the powder chamber expediently has an inlet for (compressed) air and an outlet for the powder / air mixture.
  • the powder chamber thus serves not only as a pure "powder reservoir” but above all also to provide a powder / air mixture which is as uniform as possible for the cleaning of the teeth, and inside the powder chamber or inside the electrically conductive contact surface is advantageously used
  • the electrically conductive guide region or the contact surface has the effect that controlled discharges of existing electrostatic charges on the one hand can be prevented and, on the other hand, that the charges which are generally caused by static electricity can be prevented
  • the swirling of the powder particles in the powder chamber causes the powder particles to bump together - "rub" - and become electrostatically charged. When they touch or hit the wall of the powder chamber, the same effect occurs.
  • the powder chamber has the guide area or the contact surface, this disadvantage existing in the prior art can be effectively eliminated. Specifically, therefore, existing electrical or electrostatic charges of the powder particles can be dissipated and it can be prevented that the flying powder particles even electrically charge to any significant extent, characterized in that the contact surface of the guide region is disposed within the powder chamber.
  • the contact surface has a specific surface resistance in a range from about 10 12 to 10 2 ⁇ , preferably below 10 9 ⁇ and of materials and the Ableitwiderstand of devices against a reference potential (eg: earth) have a decisive influence on the ESD protection (Electrostatic Discharge).
  • Friction on bodies causes charging. Materials that have a sufficiently low surface resistance ensure that, on the one hand, the amount of charging voltage is minimized and, on the other hand, that the electrostatic charge can be reduced again.
  • the leakage resistance of devices ensures that electrostatic charges can flow away against the reference ground potential and thus can not cause excessive charging.
  • the bleeder resistor can thus reduce high voltages in a controlled manner.
  • the contact surface is static dissipative or antistatic, static conductive, conductive or even conductive.
  • static dissipative materials are referred to having a surface resistance between 10 9 to 10 12 ⁇ .
  • Materials having a surface resistance in a range of 10 6 to 10 9 ⁇ are referred to as static conductive.
  • Materials with a surface resistance between 10 2 to 10 5 ⁇ are referred to as conductive and materials with a conductivity of 10 4 to 10 2 ⁇ are referred to as conductive.
  • a part or section of the inner wall of the powder chamber is formed as a contact surface or has these. Possibly. the entire inner wall of the powder chamber could be formed as a contact surface or these form.
  • the contact surface or the guide surface is arranged at a distance from the inner wall of the powder chamber.
  • the guide surface is arranged immediately before or at a fixed distance from an exit opening from which the powder passes.
  • the guide area serves primarily to prevent the away or dissipate or dissipate electrical charge.
  • the contact and Leit Gebt may be multi-part, in particular in two parts but also formed in one piece.
  • the volume resistance is in a usual range for the materials used.
  • materials for the guide region various metals such as aluminum, steel, copper and the like can be used. But especially preferred are modified plastics which have the surface resistances mentioned above, suitable base materials being for example polyoxymethylene (POM) or polyethylene (PE).
  • POM polyoxymethylene
  • PE polyethylene
  • To increase the conductivity can be added to the plastics, for example, graphite.
  • the following materials may also be added or used: carbon black, carbon fiber, graphite, metal powder, steel fibers and / or nanoscale fibers. It has proven to be sufficient if the contact region is formed at least static dissipative, that has a surface resistance between 10 9 to 10 12 ⁇ . A conductivity, such. As metals, is usually not necessary.
  • the conductive area may be or include a cable or a conduit.
  • the guide region can also be shaped / formed by a part or section of the powder chamber itself.
  • the powder chamber may comprise a plurality of guide regions (for example 2, 3, 4, 5, 6 or more), which are optionally connected to one another in an electrically conductive manner. The leading areas are then z. B, arranged at different locations in / on the powder chamber or formed, for example, laterally, above and below, etc.
  • the skilled person understands a modified plastic such a plastic which is electrically conductive by the addition of an additive material.
  • the electrical conductivity is adjusted in a targeted manner by the addition of the additional material, preferably adjusted depending on the particle size of the intended powder in the powder chamber.
  • the conductor region and / or the contact region is made at least for the most part, ie more than 70%, preferably more than 80% and particularly preferably more than 90%, of a modified plastic.
  • the powder chamber comprises a chamber wall, which is made of a non-metallic material, in particular a transparent plastic, wherein preferably a portion of the chamber wall is formed as a guide area. Possibly.
  • the powder chamber can be a powder chamber which can be arranged on a powder blasting machine and z. B. can be replaced (for example, if it is empty). But it may also be a powder chamber, which is firmly integrated in a powder blasting machine.
  • the chamber wall is made of the transparent material, in particular the transparent plastic, since then the powder level and the proper mixing can be easily monitored.
  • the powder chamber is exchangeable and has a substantially bottle-shaped shape, comprising z. B. a substantially cylindrical, rotationally symmetrical hollow body, which has a lid or closure, via which a filling with powder is possible.
  • the entire chamber does not need to be transparent, for example, but only one, preferably along the vertical axis extending, slot-shaped area which is designed such that a powder level can be monitored.
  • the guide region comprises a connection region, which is designed to ground the conduction region. This ensures that even the control area itself can deliver or pass on its electrical charge.
  • the connection region itself is likewise preferably designed to be electrically conductive.
  • the connection region is preferably arranged on an outer side of the powder chamber or forms an outer side of the powder chamber.
  • an outer portion is formed on an outer side of the powder chamber as a terminal portion.
  • the guide area expediently extends over a complete wall thickness of the chamber wall and at the same time comprises the contact surface which is formed inside the powder can and the connection region which is arranged outside the powder can.
  • at least a portion of the chamber wall is the guide region.
  • the powder chamber expediently has a closure for closing the powder chamber, wherein the closure according to a preferred embodiment has or forms the guide region or is designed as this.
  • a powder chamber with an ESD closure is preferred.
  • the closure has proven to be ideal, as this does not have to be transparent and represents an additional component that can be easily replaced or supplemented.
  • Known powder chambers can therefore be retrofitted easily and inexpensively.
  • the addition of materials to increase the conductivity of plastics, such. Graphite or carbon fibers usually reduce their transparent properties, but at high concentrations of such additions to increase conductivity they may even become opaque.
  • a closure preferably a separate component that can be reversibly detached from the powder chamber.
  • a configuration not only allows the closure to be replaced regularly, but also allows the conductor area to be manufactured as a separate component.
  • the conductor region of the powder chamber, in particular the closure forms a proportion of between 5% and 50%, preferably between 5% and 35% and especially preferably between 5% and 10% of the total volume of the powder chamber closed with the closure.
  • the closure can be clipped or screwed to a base body of the powder chamber.
  • the closure is arranged such that it is well hit by the powder particles, in particular also those which do not immediately leave the powder chamber again.
  • the closure is preferably opposite an air inlet of the powder chamber or in a (with respect to a vertical axis / longitudinal axis of the powder chamber) arranged at the upper portion of the powder chamber.
  • the closure is made of plastic and has a core made of an electrically conductive material, for. Metal.
  • the core need not be completely surrounded by plastic, but can form the contact surface, whereby a direct contact with the powder particles is possible.
  • connection region which can likewise be formed by the core, which enables grounding of the conduction region / core.
  • the core can also be completely encased by plastic, in which case the plastic itself provides the necessary properties of the contact surface of the guide region, ie does not have an insulating effect, so that charging / discharging is ensured.
  • the closure has an electrically conductive surface.
  • the guide area is thus formed by the surface of the closure.
  • Such a guide region can be designed, for example, as a coating.
  • a guidance area of this kind can alternatively also be produced by painting or vapor deposition.
  • the closure is formed from a plastic which has a plurality of electrically conductive particles, whereby its conductivity can be increased.
  • Preferred plastics or preferred agents for increasing the conductivity have already been mentioned in general in connection with the guide region and here apply analogously and correspondingly.
  • the powder chamber has a baffle surface which is designed to deflect and / or deflect a powder jet within the powder chamber, the baffle surface preferably being in the form of a contact surface.
  • the air in particular compressed air, laterally is fed in an upper part of the powder chamber, while according to a second, preferred variant, the air is passed from below into the powder chamber.
  • the powder chamber has a corresponding outlet / outlet for diverting the powder / air mixture.
  • the baffle preferably serves to deflect and / or divert the air / powder flow within the powder chamber, for example in the direction of the exit or generally approximately transversely to a flow direction to allow a uniform turbulence.
  • the impact surface is therefore a component or a component within the powder chamber which comes into contact with the flying or swirling powder particles particularly frequently. Therefore, it is particularly advantageous if the baffle surface is formed as a guide region or as a contact surface. In particular, by deflecting the powder, a high electrical discharge of the powder can be realized.
  • the closure has the baffle surface.
  • the baffle is flat, but also curved, such. B. concave or convex.
  • the powder chamber comprises a guide element, in particular a Venturi tube, wherein the guide element is designed to guide a powder flow along a flow direction in the direction of the baffle.
  • the guide element is expediently a tubular element which extends along a longitudinal axis / vertical axis of the powder chamber. Below the guide element, at a certain distance, the air inlet is arranged. The guide element itself is surrounded by powder.
  • the powder chamber with (compressed) air is applied, is over
  • the inlet air is guided into the powder chamber and it is sucked or entrained surrounding powder in the guide element.
  • the guide element then directs a flow of powder and air (the powder flow, according to various embodiments, 15 to 20 g / min and more) along the direction of flow corresponding to the longitudinal direction of the guide element in the direction of the baffle, where it is suitably deflected and with great advantage at the same time electrostatically discharged.
  • the baffle surface is oriented at an angle of approximately 20 ° to 90 ° to the flow direction or to the guide element, particularly preferably at an angle of approximately 45 ° to 90 °.
  • the powder chamber has an insert within which the powder is stored.
  • the insert according to one embodiment, is shaped and configured to receive and preferentially guide or direct the powder towards the (air) inlet, which according to preferred embodiments is disposed in a bottom portion or bottom member of the powder chamber.
  • the powder chamber has a cylindrical, rotationally symmetrical basic shape and comprises a (possibly removable) bottom element and a closure. Within the powder chamber expediently the insert is arranged.
  • the aforesaid guide element or Venturi tube is likewise arranged inside the powder chamber or directly on the aforementioned insert.
  • the insert can also be designed to be electrically conductive.
  • the powder sweeps along during swirling, so that it forms a particularly suitable discharge surface.
  • the bottom element which preferably has the aforementioned air inlet, can itself advantageously be made interchangeable.
  • the diameter of the powder chamber is z. In a range of about 7 to 18 cm, the height (measured along the longitudinal axis) in a range of about 10 to 25 cm.
  • the powder dispenser has at least one fastening and / or arrangement region which is designed to fasten and / or lock the powder cans and / or to arrange them on another component, wherein the connection region preferably comprises the fastening and / or assembly region or training.
  • the attachment and / or arrangement area is part of the guide area or is formed by this.
  • the closure comprises the fastening and / or arrangement region or is designed as a fastening and / or arrangement region.
  • the powder chamber is advantageously locked or clamped over the closure in a corresponding powder blasting machine, in particular along the longitudinal axis of the powder chamber.
  • the closure expediently has the electrically conductive guide region or is designed as such, it is very easy to ground the guide region.
  • Such a closure or guide region expediently has both the contact surface and the connection region, wherein the connection region is advantageously designed as a fastening and / or arrangement region.
  • the invention is also directed to a closure for a powder chamber of a dental powder blasting apparatus, wherein the closure has an electrically conductive guide region or is designed as such.
  • the closure also comprises an outlet / outlet for a powder or a powder / air mixture.
  • the closure comprises a baffle surface and a side surface which is cylindrical and / or tapered.
  • the side surface is designed such that it is arranged in a corresponding opening of the powder chamber.
  • the outlet is arranged in the side surface and extends in such a way that it leads outward on an upper side of the closure which is preferably substantially opposite the baffle surface.
  • Such a course can be realized inexpensively, for example, by means of two corresponding holes.
  • a closure preferably a separate component that can be reversibly detached from the powder chamber.
  • Such a configuration not only allows the closure to be replaced regularly, but also allows the conductor area to be manufactured as a separate component.
  • the invention is further directed to a powder blasting apparatus, in particular to a dental powder blasting apparatus or abrasive blasting apparatus, wherein the powder blasting apparatus comprises means for grounding or equipotential bonding, wherein the means are designed, a powder chamber, which in or on the Pulverstrahlmass réelle arranged or can be arranged is to ground.
  • the powder blasting device expediently comprises at least one fastening and / or arrangement region which is designed to cooperate with a fastening and / or arrangement region of a powder chamber in such a way that locking / fastening and grounding of the powder chamber or, in particular, its guide region can take place.
  • the formation of the means for grounding or equipotential bonding within the powder blasting device is not critical and well known to those skilled in the art, so that will not be discussed further on possible embodiments of the grounding of the powder blasting machine at this point.
  • the powder blasting apparatus is designed in such a way that, when arranging or fastening or locking the powder chamber, the grounding of the powder chamber via the powder blasting apparatus is made possible at the same time.
  • the powder according to the invention radiator all the advantages and features that have already been mentioned in relation to the powder chamber and the closure, analog and corresponding or vice versa. Further advantages and features will become apparent from the following description of an embodiment of the powder chamber according to the invention or the closure according to the invention with reference to the accompanying figure.
  • FIG. 1 shows an embodiment of the invention in a sectional representation, namely a powder chamber 10, comprising a substantially rotationally symmetrical shell or chamber wall 14.
  • a powder chamber 10 comprising a substantially rotationally symmetrical shell or chamber wall 14.
  • This has an opening in which a closure 40 is arranged.
  • the powder chamber 10 is closed by a bottom element 12, which has an inlet 13 for (compressed) air.
  • the closure 40 has an outlet 42 for a powder / air mixture.
  • an insert 62 is arranged, which serves to store a powder, not shown here.
  • the powder chamber 10 extends along a vertical axis / longitudinal axis L.
  • a guide element 60 which is designed to guide a stream of a powder / air mixture along a flow direction S.
  • a baffle surface 50 is oriented.
  • the powder / air mixture is directed by the guide member 60.
  • the closure 40 is simultaneously formed as a guide region 20, wherein the closure 40 is advantageously formed of plastic and having a core of an electrically conductive material has a conductive surface and / or a plurality of electrically conductive particles.
  • the baffle surface 50 is formed as a contact surface 21 of the guide region 20.
  • the arrangement shown in FIG. 1 ensures that as far as possible all powder particles touch the guide region 20 or the contact surface 21, which simultaneously constitutes the baffle surface 50, thereby ensuring that as many powder particles as possible are discharged.
  • the closure 40 has a side surface 44 which each can also be designed as a contact surface 21 according to embodiment. Inn area of the side surface 44 is also the already mentioned outlet 42 is arranged, which is ultimately realized in the embodiment shown here by two holes.
  • the powder cannister 10 also has two mounting areas 16, with a lower locating area 16 being formed by the bottom member 12, while an upper locating area 16 is formed by the shutter 40.
  • the mounting or locating portions 16 are formed via respective recesses in which a congruently formed geometry of a powder blasting machine can intervene.
  • the attachment or arrangement region 16 of the closure element 40 is simultaneously formed as a connection region 22, which is also designed to be electrically conductive. In this respect, an equipotential bonding or grounding of the guide region 20, in particular when locking or securing the powder chamber 10 in a corresponding powder blasting device, is made possible in a structurally simple manner.
  • the powder blasting apparatus which is not shown here, expediently has a corresponding locking mechanism which biases the powder chamber 10 along the longitudinal axis L, whereby the closure 40 is pressed onto the shell 14 such that it is securely closed.
  • the closure 40 is expediently sealed relative to the shell 14 by a seal 80, for example a correspondingly formed O-ring.
  • a similar seal 80 may also be used in liner 62 for sealing relative to shell 14.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

Chambre à poudre (10), en particulier pour un appareil de projection de poudre dentaire, qui comprend au moins une zone conductrice (20) qui est électriquement conductrice, ladite zone conductrice (20) présentant une surface de contact (21) réalisée à l'intérieur de la chambre à poudre (10).
EP17705810.4A 2016-02-04 2017-02-03 Chambre à poudre Active EP3410978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016201693.8A DE102016201693B4 (de) 2016-02-04 2016-02-04 Pulverkammer, Verschluss für eine Pulverkammer sowie Pulverstrahlgerät
PCT/EP2017/052424 WO2017134242A1 (fr) 2016-02-04 2017-02-03 Chambre à poudre, fermeture pour une chambre à poudre et appareil de projection de poudre

Publications (2)

Publication Number Publication Date
EP3410978A1 true EP3410978A1 (fr) 2018-12-12
EP3410978B1 EP3410978B1 (fr) 2020-04-29

Family

ID=58057093

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17705810.4A Active EP3410978B1 (fr) 2016-02-04 2017-02-03 Chambre à poudre

Country Status (4)

Country Link
US (1) US11406475B2 (fr)
EP (1) EP3410978B1 (fr)
DE (1) DE102016201693B4 (fr)
WO (1) WO2017134242A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11577366B2 (en) 2016-12-12 2023-02-14 Omax Corporation Recirculation of wet abrasive material in abrasive waterjet systems and related technology
US11224987B1 (en) 2018-03-09 2022-01-18 Omax Corporation Abrasive-collecting container of a waterjet system and related technology
CN110537986A (zh) * 2019-09-09 2019-12-06 桂林市啄木鸟医疗器械有限公司 一种用于牙科喷砂洁治设备的砂粉罐
GB2601518A (en) * 2020-12-02 2022-06-08 Flowtech International Ltd Abrasive blasting system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1773414U (de) 1958-05-06 1958-09-04 Josef Brand Hydraulischer grubenstempel.
DE1773414B1 (de) 1968-05-11 1971-10-07 Kulzer & Co Gmbh Vakuum dosier und mischgeraet fuer feinpulverige sich elektro statisch aufladende materialien
US3704811A (en) * 1970-07-24 1972-12-05 Creative Ideas Inc Portable sandblaster
US4494932A (en) * 1983-02-18 1985-01-22 Cooper Lasersonics, Inc. Dental cleaning apparatus and method
US4487582A (en) 1983-02-18 1984-12-11 Cooper Lasersonics, Inc. Dental cleaning system
US5181349A (en) * 1991-09-19 1993-01-26 Sandair Nevada, Inc. Self-powered unitary portable granular particle ejector tool
JP3345316B2 (ja) 1996-09-27 2002-11-18 カルテンバハ アンド フォイト ゲー エム ベー ハー アンド カンパニー 医薬又は歯科医療のための手器具
GB2410710A (en) * 2003-12-12 2005-08-10 Pentagon Glass Tech Ltd Pneumatic etching device
AT504638B1 (de) 2006-12-05 2008-07-15 Acd Medical Innovation Vorrichtung zum erzeugen eines pulverstrahls
EP1972295B9 (fr) 2007-03-19 2021-07-14 Ferton Holding S.A. Conteneur de poudre pour un pulvérisateur de poudre
DE102010043470A1 (de) * 2010-11-05 2012-05-10 Evonik Degussa Gmbh Zusammensetzung aus Polyamiden mit niedriger Konzentration an Carbonsäureamidgruppen und elektrisch leitfähigem Kohlenstoff
US9050704B1 (en) 2013-03-15 2015-06-09 Omax Corporation Abrasive-delivery apparatuses for use with abrasive materials in abrasive-jet systems and related apparatuses, systems, and methods

Also Published As

Publication number Publication date
DE102016201693A1 (de) 2017-08-10
EP3410978B1 (fr) 2020-04-29
DE102016201693B4 (de) 2018-03-08
US11406475B2 (en) 2022-08-09
WO2017134242A1 (fr) 2017-08-10
US20190038380A1 (en) 2019-02-07

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